diff --git a/.pi/iop-rule-loader.ts b/.pi/iop-rule-loader.ts
index 363f39a..baccbbb 100644
--- a/.pi/iop-rule-loader.ts
+++ b/.pi/iop-rule-loader.ts
@@ -19,7 +19,15 @@ type ProviderMessage = {
 };
 
 type ProviderPayload = {
+	model?: unknown;
 	messages?: ProviderMessage[];
+	temperature?: unknown;
+	top_p?: unknown;
+	seed?: unknown;
+	think?: unknown;
+	reasoning_effort?: unknown;
+	thinking_token_budget?: unknown;
+	include_reasoning?: unknown;
 	[key: string]: unknown;
 };
 
@@ -43,6 +51,7 @@ const responseLanguageUserPrefix = `[IOP 응답 언어: 이번 요청에서 사
 
 const responseLanguageUserSuffix = `[응답 전 확인: 자연어 설명이 한국어인지 확인하고, 한국어가 아니면 한국어로 다시 작성한다.]`;
 
+const defaultThinkingTokenBudget = 8192;
 const nonKoreanCJKPattern = /[\u3040-\u30ff\u3400-\u4dbf\u4e00-\u9fff]/;
 
 const commonRequiredSessionRules: RuleSpec[] = [
@@ -208,8 +217,29 @@ function contentAsText(content: unknown): string {
 	return "";
 }
 
-function messageText(message: PiMessage): string {
-	return contentAsText(message.content);
+function visibleMessageText(message: PiMessage): string {
+	const content = message.content;
+	if (typeof content === "string") {
+		return content;
+	}
+	if (!Array.isArray(content)) {
+		return "";
+	}
+	return content
+		.map((item) => {
+			if (typeof item === "string") {
+				return item;
+			}
+			if (!item || typeof item !== "object") {
+				return "";
+			}
+			const type = String((item as { type?: unknown }).type ?? "");
+			if (type !== "text" || !("text" in item)) {
+				return "";
+			}
+			return String((item as { text?: unknown }).text ?? "");
+		})
+		.join("\n");
 }
 
 function messageHasToolCall(message: PiMessage): boolean {
@@ -237,10 +267,49 @@ function replaceMessageText(message: PiMessage, text: string): PiMessage {
 	};
 }
 
+function applyIopOrnithDefaults(payload: ProviderPayload): boolean {
+	if (payload.model !== "ornith:35b") {
+		return false;
+	}
+
+	let changed = false;
+	if (payload.temperature === undefined) {
+		payload.temperature = 0;
+		changed = true;
+	}
+	if (payload.top_p === undefined) {
+		payload.top_p = 1;
+		changed = true;
+	}
+	if (payload.seed === undefined) {
+		payload.seed = 1;
+		changed = true;
+	}
+	if (payload.think === undefined && payload.reasoning_effort !== "none") {
+		payload.think = true;
+		changed = true;
+	}
+	if (
+		payload.thinking_token_budget === undefined &&
+		payload.think !== false &&
+		payload.reasoning_effort !== "none"
+	) {
+		payload.thinking_token_budget = defaultThinkingTokenBudget;
+		changed = true;
+	}
+	if (payload.include_reasoning === undefined) {
+		payload.include_reasoning = false;
+		changed = true;
+	}
+
+	return changed;
+}
+
 function injectResponseLanguagePolicy(payload: ProviderPayload): ProviderPayload | undefined {
 	const messages = payload.messages;
 	if (!Array.isArray(messages)) {
-		return undefined;
+		const changed = applyIopOrnithDefaults(payload);
+		return changed ? payload : undefined;
 	}
 
 	const systemIndex = messages.findIndex((message) => message.role === "system" || message.role === "developer");
@@ -254,7 +323,8 @@ function injectResponseLanguagePolicy(payload: ProviderPayload): ProviderPayload
 	const needsUserPolicy = userIndex >= 0 && !contentHasUserPolicy(messages[userIndex].content);
 
 	if (!needsSystemPolicy && !needsUserPolicy) {
-		return undefined;
+		const changed = applyIopOrnithDefaults(payload);
+		return changed ? payload : undefined;
 	}
 
 	const nextMessages = [...messages];
@@ -287,15 +357,7 @@ function injectResponseLanguagePolicy(payload: ProviderPayload): ProviderPayload
 		...payload,
 		messages: nextMessages,
 	};
-	if (nextPayload.temperature === undefined) {
-		nextPayload.temperature = 0;
-	}
-	if (nextPayload.top_p === undefined) {
-		nextPayload.top_p = 1;
-	}
-	if (nextPayload.seed === undefined) {
-		nextPayload.seed = 1;
-	}
+	applyIopOrnithDefaults(nextPayload);
 
 	return nextPayload;
 }
@@ -342,7 +404,7 @@ ${buildRulesPrompt(projectRoot, loadedRules)}`,
 			return;
 		}
 
-		const text = messageText(message);
+		const text = visibleMessageText(message);
 		if (!text || !nonKoreanCJKPattern.test(text)) {
 			return;
 		}